Justice BREYER delivered the opinion of the Court.
A federal court of appeals normally will not correct a legal error made in criminal trial court proceedings unless the defendant first brought the error to the trial court's attention. See United States v. Olano, 507 U.S. 725, 731, 113 S.Ct. 1770, 123 L.Ed.2d 508 (1993). But Federal Rule of Criminal Procedure 52(b), creating an exception to the normal rule, says that "[a] plain error that affects substantial rights may be considered even though it was not brought to the [trial] court's attention." (Emphasis added.) The Rule does not say explicitly, however, as of just what time the error must be "plain." Must the lower court ruling be plainly erroneous as of the time the lower court made the error? Or can an error still count as "plain" if the erroneous nature of that ruling is not "plain" until the time of appellate review?
The case before us concerns a District Court's decision on a substantive legal question that was unsettled at the time the trial court acted, thus foreclosing the possibility that any error could have been "plain" then. Before the case was final and at the time of direct appellate review, however, the question had become settled in the defendant's favor, making the trial court's error "plain" — but not until that later time. In our view, as long as the error was plain as of that later time — the
In early 2010, Armarcion Henderson, the petitioner, pleaded guilty in Federal District Court to a charge of being a felon in possession of a firearm. 646 F.3d 223, 224 (C.A.5 2011). The District Judge accepted the plea and, in June 2010, he sentenced Henderson to an above-Guidelines prison term of 60 months. Ibid. The judge entered the longer sentence to "try to help" Henderson by qualifying him for an in-prison drug rehabilitation program, a program that would provide "the treatment and the counse[l]ing that this defendant needs right now." App. to Pet. for Cert. 35a, 40a.
Henderson's counsel did not object. Indeed, the judge asked counsel if there was "any reason why that sentence as stated should not be imposed." Id., at 41a. And counsel replied, "Procedurally, no." Ibid. Subsequently, Henderson appealed, claiming, among other things, that the District Court had "plain[ly]" erred in sentencing him to an above-Guidelines prison term solely for rehabilitative purposes. 646 F.3d, at 224.
In 2011, after Henderson was sentenced but before Henderson's appeal was heard, this Court decided Tapia v. United States, 564 U.S. ___, 131 S.Ct. 2382, 180 L.Ed.2d 357. There, we held that it is error for a court to "impose or lengthen a prison sentence to enable an offender to complete a treatment program or otherwise to promote rehabilitation." Id., at ___, 131 S.Ct., at 2393. Given Tapia, Henderson's sentence was unlawful, and the District Court's decision to impose that sentence was erroneous. But, since Henderson's counsel had not objected in the trial court, the Court of Appeals could not correct the error unless Rule 52(b) applied. The Rule, however, applies only if the error was "plain." The error was not plain before Tapia; it was plain after Tapia. Thus, the Fifth Circuit had to determine the temporal scope of Rule 52(b)'s words "plain error."
The appeals court decided that Rule 52(b) did not give it the authority to correct the trial court's error. 646 F.3d, at 225. The appellate panel pointed out that, "[b]efore Tapia, there was a circuit split on whether a District Court can consider a defendant's rehabilitative needs to lengthen a sentence." Ibid. The panel added that the Fifth Circuit had "not pronounced on the question" before Henderson was sentenced. Ibid. Thus, at the time when the District Court reached its decision, the law in that Circuit was unsettled. The Court of Appeals concluded that "Henderson cannot show that the error in his case was plain, ... because an error is plain only if it was clear under current law at the time of trial." Ibid. (internal quotation marks omitted).
The Fifth Circuit denied rehearing en banc by a divided vote. 665 F.3d 160 (2011) (per curiam) (7 to 10). Henderson filed a petition for certiorari. And we granted the petition to resolve differences among the Circuits. Compare, e.g., United States v. Cordery, 656 F.3d 1103, 1107 (C.A.10 2011) (time of review), with, e.g., United States v. Mouling, 557 F.3d 658, 664 (C.A.D.C.2009) (time of error).
Is the time for determining "plainness" the time when the error is committed, or can an error be "plain" if it is not
On the other hand, "[t]he general rule ... is that an appellate court must apply the law in effect at the time it renders its decision." Thorpe v. Housing Authority of Durham, 393 U.S. 268, 281, 89 S.Ct. 518, 21 L.Ed.2d 474 (1969). See Ziffrin v. United States, 318 U.S. 73, 78, 63 S.Ct. 465, 87 S.Ct. 621 (1943). Indeed, Chief Justice Marshall wrote long ago:
This principle favors assessing plainness at the time of review.
Rule 52(b) itself makes clear that the first principle is not absolute. Indeed, we have said that a "`rigid and undeviating judicially declared practice under which courts of review would invariably and under all circumstances decline to consider all questions which had not previously been specifically urged would be out of harmony with ... the rules of fundamental justice.'" Olano, supra, at 732, 113 S.Ct. 1770 (quoting Hormel v. Helvering, 312 U.S. 552, 557, 61 S.Ct. 719, 85 S.Ct. 1037 (1941); ellipsis in original). But neither is the second principle absolute. Even where a new rule of law is at issue, Rule 52(b) does not give a court of appeals authority to overlook a failure to object unless an error not only "affect[s] substantial rights" but also "seriously affect[s] the fairness, integrity or public reputation of judicial proceedings." Olano, supra, at 732, 113 S.Ct. 1770 (internal quotation marks omitted; brackets in original). Because the two principles here point in different directions and neither is absolute, we cannot decide this conflict simply by looking to one rather than to the other.
The text of Rule 52(b) does not resolve the problem. It does not say that a court of appeals may consider an "error that was plain" — language that would look to the past. Rather, it simply says that a court of appeals may consider "[a] plain error." And that language leaves the temporal question open. But see infra, at 1130-1131.
Neither does precedent answer the temporal question — at least not directly. Olano is clearly relevant. There, we said that Rule 52(b) authorizes an appeals court to correct a forfeited error only if (1) there is "an error," (2) the error is "plain," and (3) the error "affect[s] substantial rights." 507 U.S., at 732, 113 S.Ct. 1770 (internal quotation marks omitted). Pointing out that Rule 52 "is permissive, not mandatory," id., at 735, 113 S.Ct. 1770, we added (4) that "the standard that should guide the exercise of remedial discretion under
Johnson v. United States, 520 U.S. 461, 117 S.Ct. 1544, 137 L.Ed.2d 718 (1997), is also relevant. We there considered a trial court's decision that was clearly correct under Circuit law when made but which, by the time of review, had become plainly erroneous due to an intervening authoritative legal decision. We concluded that, "where the law at the time of trial was settled and clearly contrary to the law at the time of appeal[,] it is enough that an error be `plain' at the time of appellate consideration." Id., at 468, 117 S.Ct. 1544. As in Olano, however, we declined to decide whether that same rule should apply where the law is unsettled at the time of error but plain at the time of review. 520 U.S., at 467-468, 117 S.Ct. 1544. As we have said, this is precisely the case now before us.
The text, precedents, and background principles do not directly dictate a result here. But prior precedent has helped to shape current law. And that precedent, read in light of those underlying principles, leads us to interpret Rule 52(b)'s phrase "plain error" as applying at the time of review. Given Johnson, a "time of error" interpretation would prove highly, and unfairly, anomalous.
Consider the lay of the post-Johnson legal land: No one doubts that an (un-objected to) error by a trial judge will ordinarily fall within Rule 52(b)'s word "plain" as long as the trial court's decision was plainly incorrect at the time it was made. E.g., Olano, supra, at 734, 113 S.Ct. 1770. That much is common ground. Johnson then adds that, at least in one circumstance, an (un-objected to) error by a trial judge will also fall within Rule 52(b)'s word "plain" even if the judge was not plainly incorrect at the time it was made. That is the circumstance where an error is "plain" even if the trial judge's decision was plainly correct at the time when it was made but subsequently becomes incorrect based on a change in law. 520 U.S., at 468, 117 S.Ct. 1544. And, since by definition the trial judge did not commit plain error at the time of the ruling, Johnson explicitly rejects applying the words "plain error" as of the time when the trial judge acted. Instead, Johnson deems it "enough that an error be `plain' at the time of appellate consideration" for that error to fall within Rule 52(b)'s category of "plain error." Ibid.
But if the Rule's words "plain error" cover both (1) trial court decisions that were plainly correct at the time when the judge made the decision and (2) trial court decisions that were plainly in correct at the time when the judge made the decision, then why should they not also cover (3) cases in the middle — i.e., where the law at the time of the trial judge's decision was neither clearly correct nor incorrect, but unsettled?
To hold to the contrary would bring about unjustifiably different treatment of similarly situated individuals. Imagine three virtually identical defendants, each from a different circuit, each sentenced in January to identical long prison terms, and each given those long sentences for the
To apply Rule 52(b)'s words "plain error" as of the time of appellate review would treat all three defendants alike. It would permit all three to go on to argue to the appellate court that the trial court error affected their "substantial rights" and "seriously affect[ed] the fairness, integrity or public reputation of judicial proceedings." Olano, supra, at 732, 113 S.Ct. 1770 (internal quotation marks omitted). To interpret "plain error" differently, however, would treat these three virtually identical defendants differently, allowing only the first two defendants, but not the third defendant, potentially to qualify for Rule 52(b) relief. All three defendants suffered from legal error; all three failed to object; and all three would benefit from the new legal interpretation. What reason is there to give two of these three defendants the benefits of a new rule of law, but not the third? Cf. Schooner Peggy, 1 Cranch, at 110.
There is no practical ground for making this distinction. To the contrary, to distinguish and treat more harshly cases where a circuit's law was unclear would simply promote arguments about whether the law of the circuit initially was unclear (rather than clearly settled one way or the other). And these arguments are likely to be particularly difficult to resolve where what is at issue is a matter of legal degree, not kind. To what extent, for example, did a prosecutor's closing argument go too far down the road of prejudice? A "time of error" interpretation also would require courts of appeals to play a kind of temporal ping-pong, looking at the law that now is to decide whether "error" exists, looking at the law that then was to decide whether the error was "plain," and looking at the circumstances that now are to decide whether the defendant has satisfied Olano's third and fourth criteria. Thus, the "time of error" interpretation would make the appellate process yet more complex and time consuming.
We recognize, as the Solicitor General points out, that a "time of error" rule, even if confined to instances in which the law is uncertain, would in such cases provide an added incentive to counsel to call the lower court judge's attention to the matter at a time when that judge could quickly take remedial action. And, even if no remedy is offered, the lower court judge's analysis may help the court of appeals to decide the legal question. See Brief for United States 30-32. See also Mouling, 557 F.3d, at 664. We disagree with the Solicitor General, however, in that we also believe that, in the present context, any added incentive has little, if any, practical importance.
That is because counsel normally has other good reasons for calling a trial court's attention to potential error — for example, it is normally to the advantage of counsel and his client to get the error speedily corrected. And, even where that is not so, counsel cannot rely upon the "plain error" rule to make up for a failure to object at trial. After all, that rule will help only if (1) the law changes in the
The upshot is that a "time of review" interpretation furthers the basic Schooner Peggy principle that "an appellate court must apply the law in effect at the time it renders its decision." Thorpe, 393 U.S., at 281, 89 S.Ct. 518. It works little, if any, practical harm upon the competing administrative principle that insists that counsel call a potential error to the trial court's attention. And, it is consistent with the basic purpose of Rule 52(b), namely the creation of a fairness-based exception to the general requirement that an objection be made at trial. See supra, at 1126.
At the same time, the competing "time of error" rule is out of step with our precedents, creates unfair and anomalous results, and works practical administrative harm. Thus, in the direct appeals of cases that are not yet final, we consider the "time of review" interpretation the better reading of Rule 52's words "plain error."
The Solicitor General makes several other important arguments, but they fail to lead us to a different conclusion. First, the Government argues that the purpose of plain-error review is to ensure "the integrity of the [trial] proceedings." Brief for United States 33-34. In turn, the argument goes, appellate courts should consider only (1) errors that counsel called to the court's attention and (2) errors that the trial court should have known about regardless, namely those that then were plain. Expanding on this theme, one Court of Appeals described plain error as "error that is so clear-cut, so obvious, a competent district judge should be able to avoid it without benefit of objection. When the state of the law is unclear at trial and only becomes clear as a result of later authority, the District Court's error is perforce not plain; we expect district judges to be knowledgeable, not clairvoyant." United States v. Turman, 122 F.3d 1167, 1170 (C.A.9 1997) (citation omitted).
This approach, however, overlooks the way in which the plain-error rule — Rule 52(b) — restricts the appellate court's authority to correct an error to those errors that would, in fact, seriously affect the fairness, integrity, or public reputation of judicial proceedings. Cf. United States v. Farrell, 672 F.3d 27, 36-37 (C.A.1 2012) (considering the issue from this perspective). And the approach runs headlong into Johnson. The error in Johnson was not an error that the District Court should have known about at the time. It was the very opposite: The District Judge should have known that his ruling (at the time he made it) was not error; and perhaps not even clairvoyance could have led him to hold to the contrary. Cf. Khan v. State Oil Co., 93 F.3d 1358, 1362-1364 (C.A.7 1996) (registering disagreement with this Court's precedent while following it nonetheless); State Oil Co. v. Khan, 522 U.S. 3, 20-22, 118 S.Ct. 275, 139 L.Ed.2d 199 (1997) (approving of that approach).
Rather, Johnson makes clear that plain-error review is not a grading system for trial judges. It has broader purposes, including in part allowing courts of appeals better to identify those instances in which the application of a new rule of law to
Second, the Government fears that our holding will lead to too many claims of "plain error." Brief for United States 26-28. After all, courts of appeals, not just the Supreme Court, clarify the law through their opinions. When a court of appeals does so, will not all defendants, including many who never objected in the court below, insist that the court of appeals now judge their cases according to the new rule? And will "plain error" in such cases not then disappear, leaving only simple "error" in its stead?
The answer to this claim is that a new rule of law, set forth by an appellate court, cannot automatically lead that court to consider all contrary determinations by trial courts plainly erroneous. Many such new rules, as we have pointed out, concern matters of degree, not kind. And a lower court ruling about such matters (say, the nature of a closing argument), even if now wrong (in light of the new appellate holding), is not necessarily plainly wrong. The Rule's requirement that an error be "plain" means that lower court decisions that are questionable but not plainly wrong (at time of trial or at time of appeal) fall outside the Rule's scope.
And there are other reasons for concluding that our holding will not open any "plain error" floodgates. As we have said, the Rule itself contains other screening criteria. The error must have affected the defendant's substantial rights and it must have seriously affected the fairness, integrity, or public reputation of judicial proceedings. Olano, supra, at 732, 113 S.Ct. 1770. When courts apply these latter criteria, the fact that a defendant did not object, despite unsettled law, may well count against the grant of Rule 52(b) relief. Moreover, the problem here arises only when there is a new rule of law, when the law was previously unsettled, and when the District Court reached a decision contrary to the subsequent rule. These limitations may well explain the absence of any account before us of "plain error" inundation in those Circuits that already follow the interpretation we now adopt. See, e.g., Farrell, supra, at 36-37; Cordery, 656 F.3d, at 1107; United States v. Garcia, 587 F.3d 509, 519-520 (C.A.2 2009); United States v. Ross, 77 F.3d 1525, 1539 (C.A.7 1996).
Finally, the Government points out that Rule 52(b) is written mostly in the past tense. It says that a "plain error ... may be considered even though it was not brought to the court's attention." (Emphasis added.) This use of the past tense, the Government argues, refers to a "plain error" that was not "brought to the court's attention" back then, when the error occurred. And that linguistic fact, in turn, means that the error must have been plain at that time. Brief for United States 18-22.
Whatever the merits of this textual argument, however, Johnson forecloses it. The error at issue in that case was not even an error, let alone plain, at the time when the defendant might have "brought [it] to the court's attention." Nonetheless, we found the error to be "plain error." We cannot square the Government's textual argument with our holding in that case.
For these reasons, we conclude that whether a legal question was settled or unsettled at the time of trial, "it is enough that an error be `plain' at the time of appellate consideration" for "[t]he second part of the [four-part] Olano test [to be]
It is so ordered.
Justice SCALIA, with whom Justice THOMAS and Justice ALITO join, dissenting.
When the law was unsettled at the time an error was committed, the error is not "plain" within the meaning of Federal Rule of Criminal Procedure 52(b). To hold otherwise disregards the importance of claim preservation and deprives Rule 52(b)'s plainness limitation of all conceivable purpose.
The Court begins its analysis by misconceiving our task. We are here, it thinks, in order to resolve a supposed "conflict" between two "competing ... legal principles," ante, at 1126 — the principle that a legal right may be forfeited by the failure to assert it in a timely fashion, and the principle that an appellate court must apply the law in effect at the time of its judgment. To begin with, there is no such conflict. Forfeiture rules establish exceptions to the legal rights that they qualify; like all exceptions they do not "conflict" with what they modify but rather mark out its scope. And second, our task in this case is not the exalted philosophical one of deciding where justice lies. It is presumed (rightly or not) that Congress has taken that into consideration in approving the Rules of Criminal Procedure. Ours, alas, is the more mundane and lawyerly task of deciding whether the Rules of Criminal Procedure make the failure of timely objection an exception to the rule that an appellate court applies the law in effect at the time of its judgment.
Having addressed itself to the wrong question, the Court unsurprisingly gives the wrong answer. The correct answer must be sought in the text of the Federal Rules of Criminal Procedure, beginning with Rule 51(b), which provides: "A party may preserve a claim of error by informing the court — when the court ruling or order is made or sought — of the action the party wishes the court to take, or the party's objection to the court's action and the grounds for that objection." (Emphasis added). Surely this means that a party does not preserve a claim of error — cannot assert that on appeal, whatever the law on the point may be — unless he informs the court or objects to the court's action when the ruling or order is made or sought. If it does not mean that, it means nothing.
We move then to Rule 52(b), which says: "A plain error that affects substantial rights may be considered even though it was not brought to the [trial] court's attention." The meaning of that is not difficult to grasp. It is an exception to Rule 51(b)'s rule of forfeiture — an exception that applies only to "plain error." The question before us is whether plainness means plainness at the time "the [trial] court ruling or order is made or sought" or plainness when the case reaches the Court of Appeals.
The answer to that question seems to me entirely clear. A rudimentary principle of textual interpretation — so commonsensical that it scarcely needs citation — is that if one interpretation of an ambiguous provision causes it to serve a purpose consistent with the entire text, and the other interpretation renders it pointless, the former prevails. Limiting review of forfeited errors to those that were "plain" when the objection should have been made serves a purpose consistent with Rule 51: It permits reviewing courts to correct error where doing so will not thwart the objective
The Court, on the other hand, is unable to provide any purpose served by a plainness requirement applied when the case reaches the Court of Appeals. Consider two defendants in the same circuit who fail to object to an identical error committed by the trial court under unsettled law. By happenstance, Defendant A's appeal is considered first. The court of appeals recognizes that there was error, but denies relief because the law was unclear up to the time of the court of appeals' opinion. Defendant B's appeal is heard later, and he reaps the benefit of the opinion in Defendant A's case settling the law in his favor. What possible purpose is served by distinguishing between these two appellants? "The negligence in not raising the error is equivalent regardless of what happens by the time of appeal." United States v. Escalante-Reyes, 689 F.3d 415, 429 (C.A.5 2012) (en banc) (Smith, J., dissenting). Since a plain-error doctrine of this sort cannot possibly induce counsel to make contemporaneous objection, it seemingly has no purpose whatever except to create the above described anomaly.
No, that is not quite true. It does serve the purpose of enabling today's opinion to say that the plain-error rule has been "preserved," and has not been entirely converted to a simple-error rule. Of course a simple-error rule — all trial-court mistakes affecting substantial rights can be corrected on appeal — would better serve the Court's mistaken understanding that the only purpose of Rule 52(b) is fairness, ante, at 1128-1129,
The Court contends that evaluating plainness at the trial-court level "runs headlong into Johnson [v. United States, 520 U.S. 461, 117 S.Ct. 1544, 137 L.Ed.2d 718 (1997)]." Ante, at 1129. The error there, it points out, "was not an error that the District Court should have known about at the time." Ibid. Johnson would have been decided the same way at whatever stage the plainness requirement was evaluated, since the Court found that the error did "not meet the final requirement of Olano," that "the forfeited error `seriously affect[s] the fairness, integrity or public reputation of judicial proceedings.'" 520 U.S., at 469, 117 S.Ct. 1544.
The Court wrote in Johnson a circumspect opinion that took pains to exclude from the time-of-appeal method it articulated the case before us now. After agreeing with the petitioner that in the situation before the Court a time-of-trial rule would impede rather than assist fairness and efficiency, the opinion said that "in a case such as this — where the law at the time of trial was settled and clearly contrary to the law at the time of appeal — it is enough that an error be `plain' at the time of appellate consideration." 520 U.S., at 468, 117 S.Ct. 1544. The limitation of the Court's opinion is clear. The concerns that justified evaluating plainness at the time of appeal in Johnson cut against such a rule here, where the law was not clear but uncertain at the time of trial. In the difficult and often hectic process of conducting a trial, a judge depends on the parties — "officers of the court" — to flag less-than-obvious issues that might otherwise escape his notice. A prompt claim of error in those circumstances is not futile but eminently useful.
The Court hypothesizes three defendants failing to object at trial to a ruling that later (before the case reaches the court of appeals) is shown by a Supreme Court opinion to have been error: one tried in a circuit whose law at the time clearly accorded with the Supreme Court's holding, one tried in a circuit whose law clearly contradicted that holding, and one tried in a circuit whose law on the point was uncertain. Ante, at 1127-1128. These defendants, the Court asserts, are
The Court sees no harm in its evisceration of the contemporaneous-objection rule, disbelieving that a lawyer would "deliberately forgo objection now because he perceives some slightly expanded chance to argue for `plain error' later," ante, at 1128-1129. It is hard to say whether this conclusion springs from a touching faith in the good sportsmanship of criminal defense counsel or an unkind disparagement of their intelligence. Where a criminal case always has been, or has at trial been shown to be, a sure loser with the jury, it makes entire sense to stand silent while the court makes a mistake that may be the basis for undoing the conviction. The happy-happy thought that counsel will not "deliberately forgo objection" is not a delusion that this Court has hitherto indulged, worrying as it has (in an opinion joined by the author of today's opinion) about counsel's "`sandbagging the court'" by "remaining silent about his objection and belatedly raising the error only if the case does not conclude in his favor." Puckett v. United States, 556 U.S. 129, 134, 129 S.Ct. 1423, 173 L.Ed.2d 266 (2009). In any event, sandbagging is not the only evil to be feared. What is to be feared even more is a lessening of counsel's diligent efforts to identify uncertain points of law and bring them (or rather the defendant's version of them) to the court's attention, so that error will never occur. It is remarkably naïve to disbelieve the proposition that lessening the costs of noncompliance with Rule 51(b) diminishes the incentives to be diligent in objecting. See Meltzer, State Court Forfeitures of Federal Rights, 99 Harv. L.Rev. 1128, 1135 (1986). Meant to apply only in "exceptional circumstances,"
The Court's final argument, that a time-of-error rule would "wor[k] practical administrative harm," ante, at 1129, is even more peculiar than the rest of its opinion. Whatever administrative ease may flow from a time-of-appeal rule (and more on that in a moment) it is outweighed by "lower[ing] the bar for plain-error review, which will undoubtedly result in more remands and new trials." Escalante-Reyes, 689 F.3d, at 431 (Smith, J., dissenting). The Court's Pollyannaish rejoinder is that few reversals will occur anyway because a defendant must still show that the error affected his substantial rights (Olano prong 3) and seriously affected the fairness of judicial proceedings (Olano prong 4), ante, at 1129-1131. I doubt that. Many hitherto forfeited claims may incorrectly be found to meet those vague requirements. And all claims — whether found to meet them or not — will have to be evaluated under those vague standards, requiring intensive consideration and producing a judgment whose correctness is often difficult to assess.
As for the Court's belief that it is difficult to assess whether error was plain at the time of trial: it is really not that hard. Appellate courts regularly conduct that type of inquiry in other areas of law. For example, in the context of federal habeas corpus review under 28 U.S.C. § 2254(d)(1) relief may not be granted to a state prisoner based on a legal error unless that error was contrary to or an unreasonable application of clearly established federal law as of "`the time the state court render[ed] its decision,'" Cullen v. Pinholster, 563 U.S. ___, ___, 131 S.Ct. 1388, 1399, 179 L.Ed.2d 557 (2011). Similarly, we determine whether public officials have immunity based on what law was clearly established at the time of their acts. See Harlow v. Fitzgerald, 457 U.S. 800, 818-819, 102 S.Ct. 2727, 73 L.Ed.2d 396 (1982). The Court offers us no reason to believe the inquiry would be any more difficult in this context.
In any event, a time-of-appeal rule for assessing plainness does not eliminate the need to assess plainness. And contrary to the Court's belief, that need will not arise only "when there is a new rule of law, when the law was previously unsettled, and when the District Court reached a decision contrary to the subsequent rule." Ante, at 1130 (emphasis added). That easy situation, which exists in the present case, may well be the exception rather than the rule for claims that failure to object to plain error should be excused. For a trial-court error is plain not only when it becomes so in retrospect, after the law has subsequently been clarified; but also when the court disregards the preexisting "`clarity of a statutory provision or court rule.'" United States v. Perry, 479 F.3d 885, 893, n. 8 (C.A.D.C.2007). This Court recognized as much in United States v. Olano, 507 U.S. 725, 113 S.Ct. 1770, 123 L.Ed.2d 508 (1993), where the Government "essentially concede[d]," and this Court accepted, that the District Court's interpretation of Federal Rule of Criminal Procedure 24(c) was plainly erroneous, even though the appellate court had yet to say so, because the text of the rule was so clear. Id., at 737, 113 S.Ct. 1770. For that and other reasons, the question whether the law was "unsettled" will often not admit of an easy answer, and our Courts of Appeals will have to resolve lots of claims that it was not. The practical difficulties the Court professes to avoid will not be avoided.
